fixed handling of IDs.  they may contain _ character.  (e.g.: youtube)
modifying embedconfig templates to support macro substitution preprocessing
modifying embedconfig templates to support macro substitution preprocessing
implemented search pattern macro substitution for embedconfig
cleaned up topnave, canonical samples in docs.
stage break-out of dom manipulation snippet.
moved dom gallery rendering out of html
referenced single common file for dom manipulation, showgallery.js
added anchor link around rendered, upladed images; regrouped code for two upload approaches
moved this file into new dir
fixed linking
renamed file used for testing browser file API, 'blob:' URIs, etc.